Which is the incorrect statement?

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(D) In $Schottky$ defect,ions leave the lattice,so density decreases. This is a correct statement.$FeO_{0.98}$ shows metal deficiency defect because t

Vedclass · Accepted Answer

Frenkel defect is favoured in those ionic compounds in which sizes of cation and anions are almost equal.

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(D) In $Schottky$ defect,ions leave the lattice,so density decreases. This is a correct statement.$FeO_{0.98}$ shows metal deficiency defect because the ratio of $Fe$ to $O$ is less than $1:1$. This is a correct statement.$NaCl_{(s)}$ is an insulator,$Si$ is a semiconductor,$Ag$ is a conductor,and quartz is a piezoelectric crystal. This is a correct statement.Frenkel defect occurs in ionic compounds where there is a large difference in the size of the cation and anion (cation is much smaller than the anion). Therefore,the statement that it is favoured when sizes are almost equal is incorrect.

Similar Questions

What causes the formation of a $Schottky$ defect?

Which type of crystal defect is observed in the diagram given below?
$Na^{+} Cl^{-} Na^{+} Cl^{-} Na^{+} Cl^{-}$
$Cl^{-} \square Cl^{-} Na^{+} \square Na^{+}$
$Na^{+} Cl^{-} \square Cl^{-} Na^{+} Cl^{-}$
$Cl^{-} Na^{+} Cl^{-} Na^{+} \square Na^{+}$

Assertion : Due to Frenkel defect,there is no effect on the density of the crystalline solid.
Reason : In Frenkel defect,no cation or anion leaves the crystal.

In a solid lattice,the cation has left a lattice site and is located at an interstitial position. The lattice defect is:

What does the structure of a solid containing a Schottky defect possess?

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